TY - JOUR AU - Backes, Y; Moss, A; Reitsma, J B TI - Narrow band imaging, magnifying chromoendoscopy, and gross morphological features for the optical diagnosis of t1 colorectal cancer and deep submucosal invasion: a systematic review and meta-analysis JO - Am J Gastroenterol VL - 112 PY - 2017 DO - 10.1038/ajg.2016.403 L3 - PubMed-ID: 27644737 SP - 54 EP - 64 N1 - et al. ER -